Download Apk Bb 8 Sphero

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Methods: Forty registered optometrists were randomly selected from the cities of Oxford and Westminster in the UK to perform a sphero-cylindrical refraction on an asymptomatic 29-year-old male subject. The 95% limits of reproducibility for each component of refraction were assessed and are presented together with scatterplots, distribution ellipsoids and polar profiles of dioptric power.

Run the while loop until the timout occurs, or when all points have been traversed. The control_sphero function implements the PID Controller, which outputs the desired speed of the robot, based on the distance between the current point and the next point that has to be reached.

Sphero is an inexpensive differential-drive robotic ball that can be controlled from a Bluetooth enabled device. It features a number of sensors (accelerometers, gyros, back-emf encoders) which allows it to measure its position and velocity with a fair degree of accuracy. The Sphero's RGB LEDs allow it to glow in any color of choice, while the blue back LED indicates its current orientation. Two wheels allow the Sphero to roll on the ground and to rotate along its vertical axis.

This package (which works with MATLAB releases 2014b and newer) allows us to communicate with a Sphero from within MATLAB (and Simulink), on a computer running either Windows or 64-bit version of Mac OS 10.7 or earlier.

The package is mainly based upon a "sphero" class, which in turn relies on the MATLAB Bluetooth class. The class methods and properties allow you to perform (within MATLAB) many operations available with the underlying Sphero API, such as connecting, disconnecting, sleeping, changing LED colors, reading (and/or streaming back) the Sphero's position and velocity, and commanding each of the 2 motors independently. An higher-level roll command can also be used to move the Sphero with a certain speed and direction. The Simulink library contained in the package also features Simulink blocks for setup, timing, and basic sensing and actuation.

The readme.txt file explains how to pair up the Sphero to your computer, install the package, and create Sphero objects in MATLAB, while several examples are also included to illustrate the use of the available commands and Simulink blocks.

NOTE that the 'readLocator' capability was temporarily removed in version 3.71 of the Sphero firmware, so if you need this functionality you need to use either an older or newer version of the firmware.

Purpose: : To evaluate the potential advantage of a range of image quality metrics (IQMs) over pupil plane metrics in the objective determination of the sphero-cylindrical (SC) refraction. e24fc04721